<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <div>父组件</div>
    <div>
      <button @click='handle'>销毁</button>
    </div>
    <test-tom></test-tom>
    <test-jerry></test-jerry>
  </div>
  <script src="../vue.js"></script>
  <script>
    /*
      兄弟之间的数据传递
    */
    //提供事件中心

    var hub = new Vue()
    Vue.component('test-tom', {
      data: function () {
        return {
          num: 0
        }
      },
      template: `
        <div>
          <div>TOM:{{num}}</div>
          <div>
            <button @click='handle'>点击</button>
          </div>
        </div>
      `,
      methods: {
        handle() {
          // 触发兄弟组件的事件
          hub.$emit('jerry-event', 2)
        }
      },
      mounted: function () {
        // 监听事件
        hub.$on('tom-event', (val) => {
          this.num += val
        })
      }
    })

    Vue.component('test-jerry', {
      data: function () {
        return {
          num: 0
        }
      },
      template: `
        <div>
          <div>JERRY:{{num}}</div>
          <div>
            <button @click='handle'>点击</button>
          </div>
        </div>
      `,
      methods: {
        handle() {
          hub.$emit('tom-event', 1)
        }
      },
      mounted: function () {
        // 监听事件
        hub.$on('jerry-event', (val) => {
          this.num += val
        })
      }
    })
    var vm = new Vue({
      el: '#app',
      data: {

      },
      methods: {
        handle() {
          hub.$off('tom-event')
          hub.$off('jerry-event')
        }
      }
    })
  </script>
</body>

</html>